Radicale autogit is a custom build of the radicale container image with builtin git autocommit of changes to collections.
It uses bcrypt for the credentials file, which can be mounted at /etc/radicale/auth/credentials.
The collections are stored under /var/lib/radicale.
The specific version of radicale to build can be specified through the build argument RADICALE_VERSION.
By default it points to the master branch, but can be changed to point to tags.
See https://github.com/Kozea/Radicale for all available versions.